I think it would be environmental or energy
creating "business". Nowaday there are a lot of environment
problem like climate change , energy crisis and water shortage etc
and I think for the sake of "survival" more people are
think of going into energy saving business.In fact I dared to that
that those business that can re-invented energy will be the next
big business. (For example oil is going to be use up in another 50
years or less, if someone can create "something" to replace that,
tell me isn't this a big impact and potential ?).Even UK
Secretary of Trade & Industry said this : “The next Bill Gates
will be the entrepreneur who defines the green industries.”(I am
not selling any thing)
Anyway, I have heard of an green company called Enigin who
offered business opportunity to those who are interested and
their Founder Director is Lan Wrigley FRSA, Link : http://www.enigin.net/
but not sure if this "business" is really real or good.Maybe
you can look into other "create energy" and green business as a
start and I see in future this definately is a "must" business just
like computer.Hope it help.